0.42×5= 1.8÷0.3= 3.2÷2= 0.27÷0.03=
0.01÷0.1= 2.5-2.5÷5= 0.32= 7.5÷2.5×0=
①6.5×2.8+0.85
②0.25×0.14×40
③1.25×8.8
④0.87×6.59+0.87×3.41
⑤3.91÷(22-19.7)